primer detonate on me. So i was loading some 45 on my pro 1k. primers were Win LP. was on the priming stroke and "pop". Check my self and did not see any blood. Godd thing i make it a habit of wearing safety glasses everytime i reload.

Wow! Why are primers so powerful? Seems like it would take very little spark for lack of a better word to set off the powder in a cartridge.

Have you ever tryed too burn some smokeless powder. Try it and you well see how hard it is light it And no it is not going to explode. It well only burn.
I would say you are very lucky that the hole primer tray did not go also.

Have you ever tryed too burn some smokeless powder. Try it and you well see how hard it is light it And no it is not going to explode. It well only burn.
I would say you are very lucky that the hole primer tray did not go also.

here is a question. Since lee set the primers side by side instead of stacking them in tubes like others,I would think that side impact would be less likely to set them off than stacking them on top of each other like in tubes.

When I'm loading I'm always watching to make sure there is no dirt or anything under where that primer is sitting before it gets seated in the shell. Many times I stop and take a brush and clean something out of there that drops in during reloading. If the surface the primer is on is flat I can't see why it would go off.

here is a question. Since lee set the primers side by side instead of stacking them in tubes like others,I would think that side impact would be less likely to set them off than stacking them on top of each other like in tubes.

Am i wrong?

No, you're not wrong at all. Stacked primers are very similar to a roman candle, one detonation after another. With primers the detonation of the lowest primer detonates the next and so on and so on. Obviously it all happens in a millisecond.

Jack

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No, you're not wrong at all. Stacked primers are very similar to a roman candle, one detonation after another. With primers the detonation of the lowest primer detonates the next and so on and so on. Obviously it all happens in a millisecond.

No, you're not wrong at all. Stacked primers are very similar to a roman candle, one detonation after another. With primers the detonation of the lowest primer detonates the next and so on and so on. Obviously it all happens in a millisecond.

Jack

It does not make any difference if the primers are stacked, or side-by-side. If you set one off you may or may not set the rest of them off. It is called sympathetic detention. Even with the Dillon 650 where there is a space between the primers on the disk you can set all of the primers off in the disk and up the primer tube. I have set off one primer two or three times and did not destroy anything. A friend of mine has set off all the primers a couple of times. That does destroy a couple of parts. I was there when he set off his first one and it sounded like one primer going off. Once I got the fell for the primers going in on the 650 I have not set any off for years now. It was a learning curve from the 550.